Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cellulose ester film and its manufacturing method, optical film, polarizing plate and liquid crystal display

a technology of cellulose ester and manufacturing method, which is applied in the direction of instruments, polarizing elements, transportation and packaging, etc., can solve the problems of cellulose ester film, cellulose ester film, lowering transparency, etc., and achieves excellent flatness or appearance, excellent storage stability or productivity, and free

Active Publication Date: 2008-11-04
KONICA MINOLTA OPTO
View PDF27 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The cellulose ester film exhibits improved sliding properties, reduced haze, and enhanced storage stability, ensuring high-quality optical performance and appearance in displays.

Problems solved by technology

However, such a film roll has problem in storage stability.
There is, for example, problem that the films are adhered to each other to deform or the films form a convex shape as if there is foreign matter between the films.
However, this method has problem in that when the amount of microparticles added to cellulose ester film is increased, it increases haze of the cellulose ester film, resulting in lowering of transparency.
It is difficult to obtain a cellulose ester film with improved sliding property and high transparency by increasing an amount of microparticles to be added to a cellulose ester film.
Therefore, there is problem in that the same Ra value may provide different effects in sliding property, haze or storage stability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cellulose ester film and its manufacturing method, optical film, polarizing plate and liquid crystal display
  • Cellulose ester film and its manufacturing method, optical film, polarizing plate and liquid crystal display
  • Cellulose ester film and its manufacturing method, optical film, polarizing plate and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

example 1

(Preparation of Silicon Oxide Addition Solutions “a” through “i”)

[0958]Cellulose acetate propionate (total acyl substitution degree of 2.65, an acetyl substitution degree of 1.90, and a propionyl substitution degree of 0.75) of 4.0 parts by weight were added to a mixture solvent of 82.6 parts by weight of ethylene chloride and 11.8 parts by weight of ethanol in a sealed vessel while stirring, and mixed while stirring employing a dissolver for 60 minutes. After that, 1.6 parts by weight of silicon oxide microparticles A through I as shown in Table 1 described later were added with stirring to the resulting mixture, and further stirred for 60 minutes. Thus, silicon oxide addition solutions “a” through “i” as shown in Table 2 were obtained. The average particle diameter of the particles in the silicon oxide addition solutions was measured through a particle size distribution meter LS 13320 series Multi Wave produced by Beckman-Coulter Co., Ltd.

[0959]The silicon oxide microparticles A t...

example 2

(Preparation of Cellulose Ester Film Samples 16 through 23)

(Main Dope C)

[0990]

Cellulose acetate89.5parts by weight(an acetylation degree of 60.9%)Triphenyl phosphate7.0parts by weightBiphenyl diphenyl phosphate3.5parts by weight

[0991]The above materials were dissolved in the following mixture solvent and stirred to obtain a dope with a solid concentration of 23.0% by weight.

[0992]

Methylene chloride82parts by weightMethanol15parts by weightn-Butanol3.0parts by weight

[0993]The resulting dope was filtered using a filter paper “#63” manufactured by Toyo Filter Paper Co. Ltd., further filtered using a sintered metal filter “06N” produced by Nippon Seisen Co., Ltd., and further filtered using a sintered metal filter “12N” (with a pore diameter of 40 μm) produced by Nippon Seisen Co., Ltd.

(Preparation of In-Line Addition Solution X)

[0994]

2(2′-Hydroxy-3′,5′-di-tert-5.40parts by weightbutylphenyl)-5-chlorobenzotriazole2(2′-Hydroxy-3′,5′-di-tert-10.79parts by weightamylphenyl)-5-chlorobenzotr...

example 3

[1016]The following antireflection layer solution was coated on the hard coat film samples 16 through 23 obtained above, to prepare hard coat film samples 16′ through 23′ with an anti-reflection layer.

>

[1017]

Titanium tetra-n-butoxide250parts by weightEnd group-reactive dimethylsilicone0.48parts by weightoil L-9000 produced by NipponUnicar Co., Ltd.)Aminopropyltrimethoxysilane KBE 90322parts by weight(produced by Shinetsu Kagaku Co., Ltd.)UV-curable epoxy resine21parts by weightKR 500 (produced by Asahi Denka Co., Ltd.)Propylene glycol monomethyl ether4900parts by weightIsopropyl alcohol4840parts by weight

[1018]

Titanium tetra-n-butoxide310parts by weightEnd group-reactive dimethylsilicone oil0.4parts by weightL-9000 produced by Nippon Unicar Co., Ltd.)Aminopropyltrimethoxysilane KBE 9034.8parts by weight(produced by Shinetsu Kagaku Co., Ltd.)UV-curable epoxy resine KR 5004.6parts by weight(produced by Asahi Denka Co., Ltd.)Propylene glycol monomethyl ether4900parts by weightIsopropyl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Disclosed is a cellulose ester film containing cellulose ester and microparticles having an average primary particle diameter of from 0.1 to 1.0 μm, wherein a relative standard deviation of a primary particle diameter of the microparticles is from 1 to 20%, and wherein the cellulose ester film has a surface with a peak density of from 1,000 to 8,000 (1 / mm2).

Description

[0001]This application is based on Japanese Patent Application Nos. 2004-168647 filed on Jun. 7, 2004, and 2005-072201 fined on Mar. 15, 2005 in Japanese Patent Office, the entire content of which is hereby incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to a cellulose ester film for optical use (hereinafter also referred to as a film) and its manufacturing method, and particularly to a cellulose ester film used in a polarizing plate protective film, a retardation film or a viewing angle increasing film for a liquid crystal display, in functional films for a plasma display such as an antireflection film, or in functional films for an organic EL display and its manufacturing method, and to an optical film, a polarizing plate and a liquid crystal display employing the cellulose ester film.BACKGROUND OF THE INVENTION[0003]Recently, study and development has been made regarding decrease in thickness and weight of a note board type personal computer, e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(United States)
IPC IPC(8): C09K19/02C09K19/52C08L1/10C08L1/12C09K19/00G02B1/10G02B5/30
CPCC08J5/18C08L1/10C08L1/12G02B1/105G02B5/3033Y10T428/1045C08J2301/12C08K5/3492Y10T428/1059Y10T428/1077Y10T428/1041Y10T428/10Y10T428/1036Y10T428/105C08J2301/10C09K2323/00C09K2323/03C09K2323/031C09K2323/033C09K2323/035C09K2323/05C09K2323/057G02B1/113G02B1/115G02B1/14G02B5/30G02F1/1335
Inventor MICHIHATA, ISAMU
Owner KONICA MINOLTA OPTO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com